Django example (#43)

Add a Django example

django/app/Dockerfile

@@ -0,0 +1,8 @@
+FROM python:3.7-alpine 
+EXPOSE 8000
+WORKDIR /app 
+COPY requirements.txt /app
+RUN pip3 install -r requirements.txt 
+COPY . /app 
+ENTRYPOINT ["python3"] 
+CMD ["manage.py", "runserver", "0.0.0.0:8000"]